npm create astro@latest -- --template basics
Agregar la siguente configuracion
yarn add --dev prettier prettier-plugin-astro
Luego en el user setting de vscode, (settings.json) configurar
"files.associations": {
"*.astro": "astro"
},
"editor.formatOnSave": true,
"prettier.documentSelectors": ["**/*.astro"],
"[astro]": {
"editor.defaultFormatter": "astro-build.astro-vscode"
}